The ISA Firewall HTTP Security Filter Rejects Email Messages When Opened from a Published OWA Site

Have you ever tried to open an email message via an OWA site that has been published by an ISA Firewall and received an error message indicating that the HTTP Security Filter blocked the connection? If so, you problem saw something like this:

The page cannot be displayed

Explanation: There is a problem with the page you are trying to reach and it cannot be displayed.Try the following:

Refresh page: Search for the page again by clicking the Refresh button. The timeout may have occurred due to Internet congestion.

Check spelling: Check that you typed the Web page address correctly. The address may have been mistyped.

Access from a link: If there is a link to the page you are looking for, try accessing the page from that link.

One reason why this might happen is that the message contained high-bit characters, as seen in non-English languages such as Spanish or German. You can fix this problem by configuring the HTTP Security Filter for the Web Publishing Rule to not block high-bit characters, as seen in the figure below.

Deb Shinder

Debra Littlejohn Shinder is a technology and security analyst and author specializing in identity, security and cybercrime, utilizing her past experience as a police officer and police academy/criminal justice instructor. She has written numerous books and articles for web and print publications and has been awarded the Microsoft MVP designation for fourteen years in a row.

SUBSCRIBE

Get the most recent articles straight to your inbox!

Recommended

Follow Us

The ISA Firewall HTTP Security Filter Rejects Email Messages When Opened from a Published OWA Site

TECHGENIX

TechGenix reaches millions of IT Professionals every month, and has set the standard for providing free technical content through its growing family of websites, empowering them with the answers and tools that are needed to set up, configure, maintain and enhance their networks.